import time
from datetime import datetime, timedelta

from flask import render_template, request, jsonify, current_app, redirect, url_for, session, g, abort

from info import constants, db
from info.models import User, News, Category
from info.utils.common import user_login_data
from info.utils.image_storage import storage
from info.utils.response_code import RET
from . import admin_blu


@admin_blu.route('/news_type', methods=['GET', 'POST'])
def news_type():
    """新闻分类"""

    if request.method == 'GET':
        # 查询分类信息
        try:
            category = Category.query.all()
        except Exception as e:
            current_app.logger.error(e)
            return render_template('admin/news_edit_detail.html', data={"errmsg": "数据查询错误"})

        category_list = []
        for categories in category:
            # 取到分类字典
            cate_dict = categories.to_dict()
            category_list.append(cate_dict)

        category_list.pop(0)

        data = {
            "categories": category_list
        }
        return render_template('admin/news_type.html', data = data)

    # POST
    # 取参数
    cname = request.json.get('name')
    # 传了cid代表是修改已经存在的分类
    cid = request.json.get('id')

    # 判断参数
    if not cname:
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

    if cid:
        try:
            cid = int(cid)
            category = Category.query.get(cid)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.DBERR, errmsg="数据库查询错误")

        if not category:
            return jsonify(errno=RET.DBERR, errmsg="数据库查询错误")

        category.name = cname

    else:
        # 添加参数
        category = Category()
        category.name = cname
        db.session.add(category)

    return jsonify(errno=RET.OK, errmsg="OK")


@admin_blu.route('/news_edit_detail', methods=['GET', 'POST'])
def news_edit_detail():
    """新闻版式编辑页面"""

    if request.method == 'GET':
        # 获取新闻id
        news_id = request.args.get('news_id')

        if not news_id:
            abort(404)
        try:
            news_id = int(news_id)
        except Exception as e:
            current_app.logger.error(e)
            return render_template('admin/news_edit_detail.html', data={"errmsg": "参数错误"})

        news = None  # type:News
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template('admin/news_edit_detail.html', data={"errmsg": "未查询到此新闻"})

        # 查询分类信息
        try:
            category = Category.query.all()
        except Exception as e:
            current_app.logger.error(e)
            return render_template('admin/news_edit_detail.html', data={"errmsg": "数据查询错误"})

        category_list = []
        for categories in category:
            # 取到分类字典
            cate_dict = categories.to_dict()
            if categories.id == news.category_id:
                cate_dict['is_selected'] = True
            category_list.append(cate_dict)

        category_list.pop(0)

        data = {
            "news":news.to_dict(),
            "categories": category_list
        }

        return render_template('admin/news_edit_detail.html', data=data)

    # POST
    # 获取参数
    news_id = request.form.get("news_id")
    title = request.form.get("title")
    digest = request.form.get("digest")
    content = request.form.get("content")
    index_image = request.files.get("index_image")
    category_id = request.form.get("category_id")
    # 1.1 判断数据是否有值
    if not all([title, digest, content, category_id]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    # 1.2 尝试读取图片
    if index_image:
        try:
            index_image = index_image.read()
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

        # 2. 将标题图片上传到七牛
        try:
            key = storage(index_image)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.THIRDERR, errmsg="上传图片错误")
        news.index_image_url = constants.QINIU_DOMIN_PREFIX + key

    # 3. 设置相关数据
    news.title = title
    news.digest = digest
    news.content = content
    news.category_id = category_id

    # 4. 返回结果
    return jsonify(errno=RET.OK, errmsg="编辑成功")


@admin_blu.route('/news_edit')
def news_edit():
    """新闻版式编辑列表界面"""

    page = request.args.get("p", 1)
    # 搜索关键字
    keyword = request.args.get("keyword", None)

    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    filter = [News.status == 0]
    if keyword:
        filter.append(News.title.contains(keyword))

    try:
        paginate = News.query.filter(*filter) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_basic_dict())

    context = {
                "total_page": total_page,
                "current_page": current_page,
                "news_list": news_dict_list
            }

    return render_template('admin/news_edit.html', data=context)


@admin_blu.route('/news_review_action', methods=['POST'])
def news_review_action():
    """新闻审核处理"""

    # 1.接受参数
    news_id = request.json.get('news_id')
    action = request.json.get('action')

    # 2.校验参数
    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

    if action not in ['accept', 'reject']:
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

    # 校验新闻
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据库查询失败")

    if not news:
        return jsonify(errno=RET.DBERR, errmsg="数据库查询失败")

    # 3.判断审核结果
    if action == 'accept':
        news.status = 0
    else:
        # 拒绝及其原因
        reason = request.json.get("reason")
        if not reason:
            return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
        news.reason = reason
        news.status = -1

    return jsonify(errno=RET.OK, errmsg="操作成功")


@admin_blu.route('/news_review_detail/<int:news_id>')
def news_review_detail(news_id):
    """新闻审核显示"""
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})

    # 返回数据
    data = {"news": news.to_dict()}
    return render_template('admin/news_review_detail.html', data=data)


@admin_blu.route('/news_review')
def news_review():
    """返回待审核新闻列表"""

    page = request.args.get("p", 1)
    # 搜索关键字
    keyword = request.args.get("keyword", None)

    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    filter = [News.status != 0]
    if keyword:
        filter.append(News.title.contains(keyword))

    try:
        paginate = News.query.filter(*filter) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_review_dict())

    context = {
                "total_page": total_page,
                "current_page": current_page,
                "news_list": news_dict_list
            }

    return render_template('admin/news_review.html', data=context)


@admin_blu.route('/user_list')
def user_list():
    """用户列表

    :return:
    """
    p = request.args.get('p', 1)

    try:
        p = int(p)
    except Exception as e:
        current_app.logger.error(e)
        p = 1

    user_li = []
    current_page = 1
    total_page = 1

    try:
        pag = User.query.filter(User.is_admin==False).paginate(p, constants.ADMIN_USER_PAGE_MAX_COUNT, False)
        user_li = pag.items
        current_page = pag.page
        total_page = pag.pages
    except Exception as e:
        current_app.logger.error(e)

    user_dict_li = []
    for user in user_li:
        user_dict_li.append(user.to_admin_dict())

    data = {
        "current_page":current_page,
        "total_page":total_page,
        "user_dict_li":user_dict_li
    }

    return render_template('admin/user_list.html', data=data)


@admin_blu.route('/user_count')
def user_count():
    """折线图

    :return:
    """
    # 用户总数
    total_count = 0
    try:
        total_count = User.query.filter(User.is_admin==False).count()
    except Exception as e:
        current_app.logger.error(e)
        total_count = 0

    # 用户月增加总数
    mon_count = 0
    t = time.localtime()
    begin_mon_date = datetime.strptime("%d-%02d-01" % (t.tm_year, t.tm_mon), "%Y-%m-%d")
    try:
        mon_count = User.query.filter(User.is_admin==False, User.create_time > begin_mon_date ).count()
    except Exception as e:
        current_app.logger.error(e)
        mon_count = 0

    # 用户天增加总数
    day_count = 0
    begin_day_date = datetime.strptime("%d-%02d-%02d" % (t.tm_year, t.tm_mon, t.tm_mday), "%Y-%m-%d")
    try:
        day_count = User.query.filter(User.is_admin==False, User.create_time > begin_day_date).count()
    except Exception as e:
        current_app.logger.error(e)
        day_count = 0

    # 折线图数据
    active_time = []
    active_count = []

    # strptime 字符串格式转为时间格式
    begin_day_time = datetime.strptime("%d-%02d-%02d" % (t.tm_year, t.tm_mon, t.tm_mday), "%Y-%m-%d")

    for i in range(0, 31):
        begin_day = begin_day_time - timedelta(days=i)
        end_day = begin_day_time - timedelta(days=(i-1))
        count = User.query.filter(User.is_admin == False, User.last_login  >= begin_day, User.last_login < end_day).count()

        active_count.append(count)

        # strftime 时间格式转成字符串格式
        active_time.append(begin_day.strftime('%Y-%m-%d'))

    # 反转，最近一天显示最后面
    active_time.reverse()
    active_count.reverse()

    data = {
        "total_count":total_count,
        "mon_count": mon_count,
        "day_count": day_count,
        "active_time": active_time,
        "active_count": active_count
    }

    return render_template('admin/user_count.html', data=data)


@admin_blu.route('/index')
@user_login_data
def index():
    user = g.user
    return render_template('admin/index.html', user=user.to_dict())


@admin_blu.route('/login', methods=['GET', 'POST'])
def login():
    """管理员登录
    1.获取前台传过来信息
    2.校验参数
    3.判断用户是否存在
    4.判断密码
    5.返回给前端
    :return:
    """

    # 模板渲染
    if request.method == 'GET':

        # 如果管理员已将登录跳转到后台主页
        user_id = session.get('user_id', None)
        is_admin = session.get('is_admin', False)
        if user_id and is_admin:
            return redirect(url_for('admin.index'))

        return render_template('admin/login.html')

    # 1.获取前台传过来信息
    nick_name = request.form.get('username')
    password = request.form.get('password')

    # 2.校验参数
    if not all([nick_name, password]):
        return render_template('admin/login.html', errmsg='参数不足！')

    # 3.判断用户是否存在
    try:
        user = User.query.filter(User.nick_name == nick_name, User.is_admin==True).first()
    except Exception as e:
        current_app.logger.error(e)
        return render_template('admin/login.html', errmsg='数据库查询错误！')

    if not user:
        return render_template('admin/login.html', errmsg='用户身份错误！')

    # 4.判断密码
    if not user.check_password(password):
        return render_template('admin/login.html', errmsg='密码错误！')

    # 5.保存登录状态
    session["user_id"] = user.id
    session["nick_name"] = user.nick_name
    session["mobile"] = user.mobile
    session["is_admin"] = True

    return redirect(url_for('admin.index'))

